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Recap - Two Faults

Lesson 22 of 35 in Coddy's LAN Labs course.

Challenge

Medium

Two things are wrong in this office lab. Run the check first: it catches one. Give pc2 the address 192.168.1.20/24 and gateway 192.168.1.1. Then ping pc1 from pc3 to expose the second fault, set pc3's gateway to the router's real address 10.0.0.1, and ping again.

Expected output:

WARN  pc2: no IP address
Lab check: 1 problem(s) found
pc2 eth0: 192.168.1.20/24 (mask 255.255.255.0, network 192.168.1.0/24)
pc2: gateway 192.168.1.1
pc3 -> pc1: unreachable (no device answers at gateway 10.0.0.9)
pc3: gateway 10.0.0.1
pc3 -> pc1: reply from 192.168.1.10 (ttl=63, via r1)

Try it yourself

Terminal

All lessons in LAN Labs

1Meet the Lab

Your First Lab Cables Wires Are Not Enough Recap - Build a Lab

4Routers and Gateways

Two Networks The Default Gateway Both Sides Need a Way Back Routing Tables Recap - Connect the Floors

7Growing the Office

The Plan Sales Comes Online Engineering Joins Gateways Everywhere Recap - The Printer

2Addresses on the LAN

Giving a Host an Address The First Ping What ARP Learned The Switch Learns Too Recap - First Conversation

5Troubleshooting I

The Unplugged Host The Missing Gateway The Typo in the MaskRecap - Two Faults

8Capstone - Fix the Branch

Survey the Damage Fix the Address Clash Masks and Gateways Recap - Prove It Works

3Masks Matter

Wrong Mask, No Reply Same Switch, Other Subnet Let check Do the Looking Recap - Diagnose the Pair

6Troubleshooting II

Two Devices, One Address The Network Address Trap Gateway on the Wrong Subnet Recap - The Silent Router

Practice on your own: Terminal playground